Implementation of transaction processing in MyBatisPlus

MyBatis Plus is an enhanced tool based on MyBatis, providing a more convenient database operation method. In practical applications, transaction processing is an important part of database operations, which ensures the consistency and reliability of the database. This article will introduce how to perform transaction processing in MyBatis Plus, including transaction opening, committing, rolling back and other operations.

1. Configure the data source and transaction manager

First, make sure that the data source and transaction manager are configured correctly. In MyBatis Plus, it is usually configured via Spring. Here is a simple example:

<!-- Data source configuration -->
<bean  class="">
    <!-- Database connection information -->
    <property name="driverClassName" value="" />
    <property name="url" value="jdbc:mysql://localhost:3306/mydatabase" />
    <property name="username" value="root" />
    <property name="password" value="password" />
</bean>

<!-- MyBatis PlusConfiguration -->
<bean  class="">
    <property name="dataSource" ref="dataSource" />
</bean>

<!-- 事务管理器Configuration -->
<bean  class="">
    <property name="dataSource" ref="dataSource" />
</bean>

2. Use @Transactional annotation to open a transaction

In MyBatis Plus, Spring's@TransactionalAnnotation to declare transactions. Will@TransactionalAnnotations are added to methods that require transaction support, and it automatically enables, commits, or rolls back transactions.

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Transactional
    @Override
    public void updateUser(User user) {
        // Update user information        (user);

        // Simulate throwing an exception and triggering transaction rollback        if (().equals("rollback")) {
            throw new RuntimeException("Simulated exception for rollback");
        }
    }
}

In the above example,@TransactionalAnnotations are added toupdateUserMethod. If the method executes successfully, the transaction will be committed; if the method throws an exception, the transaction will be rolled back.

3. Programmatic transaction management

In addition to using annotation methods, MyBatis Plus also supports programmatic transaction management. passTransactionTemplateorPlatformTransactionManagerManual control of transactions.

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private PlatformTransactionManager transactionManager;

    @Override
    public void updateUser(User user) {
        // Create a transaction definition        DefaultTransactionDefinition definition = new DefaultTransactionDefinition();
        // Set the isolation level of the transaction        (TransactionDefinition.ISOLATION_READ_COMMITTED);
        // Set the transaction propagation behavior        (TransactionDefinition.PROPAGATION_REQUIRED);

        // Get transaction object        TransactionStatus status = (definition);

        try {
            // Update user information            (user);

            // Simulate throwing an exception and triggering transaction rollback            if (().equals("rollback")) {
                throw new RuntimeException("Simulated exception for rollback");
            }

            // Submit transaction            (status);
        } catch (Exception e) {
            // An exception occurred and the transaction was rolled back            (status);
            throw e;
        }
    }
}

In the above example,PlatformTransactionManagerManage transactions manually. passTransactionDefinitionto set the isolation level and propagation behavior of the transaction, and then through()Get transaction objects and use them where appropriate(status)Submit a transaction or(status)Roll back the transaction.

4. Summary

Transaction processing in MyBatis Plus can be passed@TransactionalAnnotation implements declarative transactions, which can also be passedPlatformTransactionManagerCarry out programmatic transaction management. Choosing the right transaction management method depends on actual business needs and developer preferences. Hope this article can help you better understand how to perform transaction processing in MyBatis Plus.

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